Topic: How do I calculate the rate of boil-off steam in an existing pipe set-up?27 March 2019 Last edited: 27 March 2019 At 8:39am
Veerasamy Venkatesan Forum Moderator 19 Posts
Re: How do I calculate the rate of boil-off steam in an existing pipe set-up?27 March 2019 at 8:31am Last edited: 28 March 2019 at 11:40am
The Reader provided only sketchy details. I am not sure he is trying to design a boil-off tube as a part of process cooling or want to know the rate of boil-off steam in an existing set-up. I guess the latter.
As I understand, he wants to know how much steam will be discharged from the mild steel pipe, assuming he will supply enough water to the pipe section to maintain the boil-off condition. He should measure at least the pressure of boil-off steam inside the constricted tube section. Since the tube is constricted at the upper end, its inside pressure would increase above atmosphere due to boil-off. Once he finds the steam pressure inside the tube, he can use the Napier’s formula, if the boil-off steam is discharged to atmosphere.
Steam discharge through an orifice can be calculated using the Napier’s formula.